Hinged back for piano-stools



(No Model.)

J, W. PLAGG.

HINGBD BACK FOR PIANOSTOOL.

' No. 263,329. Patented Aug. 29, 1882.

v E va Ito I";

rrnD STATES PATENT Erica.

JOSEPH W. FLAGG, ()F WORCESTER, MASSACHUSETTS.

HINGED BACK FOR PIANO-STOOLS.

SIPECIFICATION forming part of Letters Patent No. 263,329, dated August29, 1882.

Application filed May 3,1882.

T 0 all whom it may concern Be it known that I, JOSEPH W. FLAGG, acitizen of the United States,residin g at Worcester, in the county ofWorcester and State of Massachusetts, have invented a new and usefulImprovement in Hinged Backs for Piano- Stools, of which the following isa specification.

My invention relates to a peculiar mode of attaching a hinged back to apiano-stool; and it has for its objects to render the back easilyremovable, and also to remove the strain from the hinge when the back isin use and make the upright or hinged support rigid.

In the accompanying drawings, Figure 1 represents a side elevation of apiano-stool embodying my invention. Fig. 2 shows a rear elevation of thesame. Figs. 3 and 4 show detached views of the hinge, the stand B 0being shown in section. Fig. 5 is a top view of the same, and Fig. 6 isa top view of the stand B G and pintle E.

Similar letters refer to similar parts in the several views.

Upon the edge of the seat A of a piano or other stool I attach theupright stand or support B 0. Near the top B is an aperture, D, Fig. 2,and immediately below the aperture D is the pintle E, firmly attached atits central section to the stand B G, and around whose free ends the twohooks F, attached to the back J, pass, forming a hinge. The hooks Fallow the back J to be lifted from the pintle when the back is in theposition shown in Figs. 1 and 2, and thereby become detached from thestand B G. From the back J extends the tongue G, forming a right angleat G, where itjoins the back, and passing through the aperture D. Theopening D should extend upward far enough at H, Fig. 2, to allow thetongue to be lifted, so as to release the hooks F from the pintle E.When the back is raised it assumes the position J, Figs. 1 and 3, theback resting against the top of the upright stand, which is made toextend upward from the pintle E for that purpose, and the tongue G willassume the position G, resting against the back of the stand B O, andthe right angle formed in the tongue at G resting on the edge I, andthereby supporting the entire weight of and downward pressure upon theback J, while the pressure against the back in front is re- (No model.)

sisted by the top of the upright stand B 0 above the hinge, and thetongue G, resting against the back of the stand B (J, as at G,

thereby entirely relieving the pintle E and hooks F from all strain. Theback 'J and upright stand B 0, being locked together, form a rigidsupport, resisting any pressure against the back in the position J,either from above downward or from the front backward. When the back israised in the position shown by the broken lines J in Fig. 1 and also byJ in Fig. 3 the hook F passes down in front of and rests against theplate B (l, the tongue G rests against the back of the plate B G, andthat portion between the right angle G and the plate J resting upon theedge I and receiving the entire pressure from above downward, allforming a foot which embraces the edge I and furnishes a firm and stablesupport for the back J; and the hook F, passing beneath the pintle E,prevents the back J from being lifted upward. The books F should nearlyor quite fill the space between the pintle E and the plate B G, and arecurved concentrically with the pintle E, so that in the operation oflowering the back the hooks F, being held against the pintle, will-turnupon them, sliding on the plate B G, and the hooks F, pintle E, andplate B G will form the operating parts of the hinge, and the tongue Gis raised from and thrown out of contact with the plate B O and edge I.When the back has been lowered in the position shown in Figs. 1 and 4the hooks F, passing between the pintle E and plate B 0, hold the backsecurely to the plate B (J. In order to remove the back, the hooks F areraised far enough to clear the pintle, the aperture D being enlarged atH for that purpose. It will be readily seen that the hooks F should notform more than one-fourth of a circle in order to allow them to beremovable.

1 am aware that hinges have been long in use having the leaf extendingbeyond the joint, so as to overlap the other leaf when the hinge isopen, thus providing a stop to prevent the hinge from being opened toofar and to relieve the pintle of strain; also, that hinges have beenheretofore constructed in which projecting spurs of a curved form haveentered slots or openings in the other leaf, the spurs and slots formingthe hinge 5 also, that hinges have been in use having wings projectingfrom the face or surface of one or both leaves to give greater rigidityto the hinge when opened. I do not claim any of the above-enumeratedfeatures, broadly.

What I claim as my invention, and desire to secure by Letters Patent, is

1. The combination, in a piano or other similar stool, of the stand B 0,attached to the seat, and having an aperture, D, and attached pintle E,the plate J, attached to the back of the stool, having hooks F, passingbetween the pintle E and plate B C, so as to hinge the back to the plateB O, and also to render it removable, and the ton gue G, bent at rightangles at G, so as to inclose and rest upon the edge I of the plate B 0,all arranged and operating as described, and for the purpose set forth.

2. The hinge consisting of leaf B 0, ex-

tended at B to form a stop, connected pintle 20 JOSEPH W. FLAGG.

\Vitnesses:

R. B. FOWLER, HENRY L. PARKER.

